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CAUTION: Do not allow the propeller shaft to drop OPERATION The propeller shaft must operate through con- stantly changing relative angles between the trans- Before undercoating a vehicle, the propeller shaft and the U-joints should be covered to pre- CAUTION: Use original equipment replacement parts for attaching the propeller shafts. The speci- PROPELLER SHAFT JOINTS DESCRIPTION Two different types of propeller shaft joints are used in WJ vehicles (Fig. 3) and (Fig. 4). Neither of LUBRICATION The factory installed universal joints are lubricated for the life of the vehicle and do not need lubrication. The Constant Velocity joint should also be inspected each time the vehicle is serviced. The CV PROPELLER SHAFT JOINT ANGLE DESCRIPTION When two shafts come together at a common joint, the bend that is formed is called the operating angle. OPERATION This cancellation is done through the phasing of a propeller shaft and ensuring that the proper propel- A propeller shaft is properly phased when the yoke ends are in the same plane, or in line. A twisted Ideally the driveline system should have; degree of each other. • Have a 3 degree maximum operating angle. • Have at least a 1/2 degree continuous operating (propeller shaft) angle. Propeller shaft speed (rpm) is the main factor in determining the maximum allowable operating angle. DIAGNOSIS AND TESTING VIBRATION Tires that are out-of-round, or wheels that are unbalanced, will cause a low frequency vibration. Driveline vibration can also result from loose or damaged engine mounts. Refer to Group 9, Engines, Propeller shaft vibration increases as the vehicle speed is increased. A vibration that occurs within a Fig. 1 Reference Marks on Yokes 1 – REFERENCE MARKS 3 - 2 PROPELLER SHAFTS WJ DESCRIPTION AND OPERATION (Continued) |